Effect of temperature on iron leaching from bauxite residue by sulfuric acid.
Bauxite residue, as solid waste from alumina production, contains mainly hematite [Fe2O3]. Kinetic study of iron leaching of bauxite residue by diluted sulfuric acid at atmospheric pressure has been investigated. The results have been obtained as following: (i) Temperature play an important role in iron leaching from bauxite residue. Higher temperature is favor of Fe(III) leaching from bauxite residue. (ii) The leaching process is applicable to the intra-particle diffusion model and the apparent activation energy of model of leaching is found to be 17.32 kJ/mol.
Liu
Zhi-Rong
ZR
Department of Applied Chemistry, East China University of Technology, Fuzhou City, Jiangxi 344000, China. liu-zhi-rong-oyx@sohu.com
Zeng
Kai
K
Zhao
Wei
W
Li
Ying
Y
D000537:Aluminum Oxide / Q000737:chemistry*; D001274:Atmospheric Pressure; D004058:Diffusion; D005290:Ferric Compounds / Q000032:analysis* / Q000737:chemistry*; D007220:Industrial Waste; D007700:Kinetics; D010316:Particle Size; D013464:Sulfuric Acids / Q000737:chemistry*; D013696:Temperature; D018505:Waste Management
D005290:Ferric Compounds; D007220:Industrial Waste; D013464:Sulfuric Acids; C000499:ferric oxide; D000537:Aluminum Oxide; C033158:sulfuric acid